IntroductionTech companies are having a good run. Thanks to the internet, which is now used by over three billion people, the reach of Facebook, Twitter, Amazon, and so on seems endless. A teenager today can find information on a range of topics that would, just 20 or so years ago, have required multiple trips to multiple libraries – and they can do...

I regard the brain as a computer which will stop working when its component fail. There is no heaven or afterlife for broken-down computers. That is a fairy story for people afraid of the dark"Stephen Hawking"